From Los Angeles:

Take State Route 14 north from Los Angeles to U.S. Highway 395
Take U.S. 395 north to Bishop
Continue north on U.S. 395 to Highway 203
Take Highway 203 west to June Mountain

June Mountain is about 323 miles from Los Angeles

From Los Angeles and Northern Orange County:

Take State Route 14 to U.S. 395, north to the Mammoth Lakes turnoff, Highway 203

The distance from Los Angeles to Mammoth is 307 miles.

From San Francisco/Sacramento:

Take Interstate 80 to U.S. 395, south to the Mammoth Lakes turnoff, Highway 203.

From Reno, Nevada:

Take U.S. 395, south to Mammoth Lakes turnoff, Highway 203 to Mammoth Lakes.

From San Diego and Southern Orange County:

Take Interstate 15 north to U.S. 395, north to the Mammoth Lakes turnoff, Highway 203.

From Reno, Nevada:

Take U.S. 395, south to Highway 203
Head west on Highway 203 to June Mountain

June Mountain is approximately 173 miles from Reno

From Reno, Nevada:

Take U.S. 395, south to Mammoth Lakes turnoff
Highway 203 to Mammoth Lakes.

From Sacramento:

Take U.S. Highway 50 east to Carson City, Nevada
Head south on U.S. Highway 395 to Highway 203
Take Highway 203 west to June Mountain

June Mountain is about 240 miles from Sacramento

From San Diego:

Take Interstate 15 north from San Diego to U.S. Highway 395
Continue north on U.S. 395 to Highway 203
Take Highway 203 west to June Mountain

June Mountain is approximately 414 miles from San Diego

From San Diego and Southern Orange County:

Take Interstate 15 north to U.S. 395, north to the Mammoth Lakes turnoff, Highway 203.

The distance from Los Angeles to Mammoth is 307 miles.

From San Francisco/Sacramento:

Take Interstate 80 to U.S. 395, south to the Mammoth Lakes turnoff, Highway 203.